The human brain is estimated to have approaching 10^11 neurons (most of them in the cerebellum).

However, a neuron is much more than a single parameter. The brain is estimated to have from 10^14 to 5x10^14 synapses.

True although a lot of those neurons and synapses are in the cerebellum, responsible for motor coordination and or in the visual cortex and so forth. Only a portion are in the language and reasoning areas. LLM's are comparable to human scale now, i think, and if trends continue will swiftly pass us by in the future.

If I had a magic button I would not only pause AI development but set it back 10 years. Sadly I have no influence on events and those who do, don't care about the future of humankind or actively wish us dead.